A messaging and social networking app that lets users send photos and videos ("Snaps") that disappear after being viewed by default.

SlideShare

A social media platform where people share presentations and infographics.

Google Groups

A Google service that provides discussion groups for people sharing common interests.

ResearchGate

A social networking platform for scientists and researchers that enables them to share publications, collaborate with peers, and engage in academic discussions online.

WeChat

A Chinese instant messaging, social media, and mobile payment app that has evolved into a super-app combining communication, commerce, and everyday services.

Stack Overflow

A question-and-answer platform for programmers.

Line

A Japanese instant messaging and social networking app often described as a super-app because it integrates services such as a digital wallet, news feed, digital comics, media streaming, and shopping.

Substack

A social media platform for writers and journalists that supports subscription newsletters and monetization.

Strava

A fitness tracking app and community-moderated social network for athletes.

Beehiiv

A comprehensive newsletter platform designed to help creators and brands build, grow, and monetize their audiences.

Academia

A social networking platform for academics that enables users to share research papers, build professional profiles, and connect with other researchers worldwide.

Gitter

An open-source chat and networking platform for software developers based on the Matrix protocol.

Yelp

An American crowd-sourced review platform where users publish ratings and written feedback about local businesses.

Ravelry

A community website for knitters, crocheters, and fiber artists.

ReverbNation

A social networking site for musicians.

Truth Social

An American social media platform owned by Trump Media & Technology Group and primarily oriented toward conservative audiences.

Viber

A free, cross-platform instant messaging and calling application owned by Rakuten.

Stack Exchange

A multi-topic question-and-answer platform for questions about math, games, languages, cooking, biology, and more.

Steam Community

A social networking site for gamers.

HackerOne

A cybersecurity platform that connects businesses with ethical hackers, penetration testers and cybersecurity researchers.

Last.fm

A music streaming and discovery platform with Internet radio and a community for music discussion.

Keybase

A key directory, secure messaging and file sharing platform.

Flipboard

A social news aggregator and content discovery platform.

Viadeo

A French career-oriented social networking platform, now owned by Le Figaro.

Lemmy

A decentralized social link aggregator platform running on independent servers and powered by the open-source Lemmy software.